<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            width: 100px;
            height: 100px;
            background-color: pink;
        }
        span{
            width: 100px;
            height: 100px;
            background-color: purple;
        }
        /*.c1{*/
            /*color: red;*/
        /*}*/
        /*.c1 a{*/
            /*color: red;*/
        /*}*/
        .c1{
            /*font-family: '楷体','宋体','微软雅黑';*/
            /*font-size:14px;*/
            /*font-weight: bold;*/
            /*font-weight: 100;*/
            color:red;
        }

        p{
            /*color: red;*/
            /*color: #78FFC9;*/
            /*color: rgb(123,199,255);*/
            color: rgba(123,199,255,0.3);

        }
    </style>
</head>
<body>
<div class="c1">
    我是div标签
    <!--<a href="">百度</a>-->
    <!--<p>-->
        <!--666-->
    <!--</p>-->
</div>
<span>
    我是
</span>

<p>
    我是一个p标签
</p>

</body>
</html>